Nut-locking means.



H. J. ZOTTEL."

NUT LOCKING MEANS.

APPLICATION FILED JULY 25.1913.

1.,QU9,302. Patented Dec.19,1916'.

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NUT-LOCKINGE1VIEANS:

Application filed July 25, 1913 1' all whom it may concern:

Be it knownthat I, HERMAN J. ZOTTEL, a

. citizenof the United States, residing, atMilwaukee, county ofMilwaukee, andState of W'isconsin, have invented certain new and usefulImprovements in Nut-Locking Means, of which the annexed is aspecification.

My invention relates particularly to those nut locking means which donot. require any special operation or provision on. either :bolt or nutbut which provide a lock intheform of a separate piece of stamping whichwill be universally applicable and can be used in securing nuts onmachines which are already in usewithout any disturbance to the nutsproper as the locking means above referred to. screw on the extremeprotrudingmargin of the bolt and bear against the i tree faceiof the nutproper.

Aim-then object of my invention is to provide a nut locking means of avery effective, strong, simple and cheap structure, enabling, a repeatedremoval of the locking means and nut proper in such a wayas not toinjure the finished facings on; machine parts, the threads of the boltsor the nuts proper to such aneXtent as to make repeated usageundesirable.

In the accompanying illustration, which forms part of thisspecification, Figurel shows a perspective View of the stamping asitcomes from the press, the thread being omitted to show theconstruction of the nut lock. Fig. 2 shows a plan view of the nut lockas it appears when finished, and Fig. 3 is a vertical sectional view ofthe same. In Fig. 4c the application of the nut-lock in combination withbolt and nut proper are shown.

Like parts will be identified by like characters throughout thisspecification.

Referring now to Figs. 1, 2 and ,3, character 1 shows three pawl-likeprojections being sheared and formed from the solid blank and owing tothe length of their sweep are rendered sufliciently flexible to yielditoa certain extent when pressure is brought to.

bear upon them. Character 2 shows a thread running through the centralopening and also adjacent to the walls 3 of the pawls 1. The said pawlsare prevented from a radial movement by the sheared walls at whichhowever will allow a longitudinal movement of the sheared projections referred to as pawls and particularly the free sheared margins 5 of thesaid pawls. At

Specification of Letters, Patent.

Patented Dec. 19, 1916.

Serial No. 781,077.

character 7 the nut lock is provided with means to apply a wrench. Itwill be noticed that for a thread having a clockwise direction, thesheared pawls 1 will have an inclination which is anti-clockwise andvice versa.

Having now the nut lock prepared as shown in Figs. 2 and 3, itsapplication is shown in, Fig. 4. As regards the nut lock I again referto the same characters as in Figs. 1, 2 and 3, but letters will be usedin referring to parts which are not part of the nut lock proper. Atletter AI show an ordinary standard bolt passing through and securingtogether two machine parts B and, C by means of some standard'nut D. Itwill be apparent that the machine parts B and C may be replaced by someflexible or loosely mounted members such as a compression spring, etc,and the standardnut Dcan then be locked at any distance from the head ofthe bolt A by means of the nut lock in question.

In practical use the nut proper is first screwed to the desired positionor against thefacing of some machine part, whereupon the nut lock isscrewed on the protruding margin of the bolt A,and against the free faceE of the nut D, preventing in the case of a, flexible member betweentheihead of the bolt A"and. the nut D a further turning of the nut D bymeans of a wrench. If sufiicient force is applied in an effort to bringthe free face E of the nut D closer to the solid margin of the nut lockby screwing the nut lock against the nut proper, the projections 1, andparticu larly the sheared margins 5 will, dueto their shape and pressureupon them, recede to a certain extent and look upon the threads of thebolt forming small depressions upon said threads of said bolt, whichprovide very effective preventives against accidental unscrewingofeither boltinut or nut lock. At the same time the sheared margins 5 ofthe nut lockforce, due to their pawl-like shape an dpressure upon them,small depressions on the free face E of the nut 1), thus providing anadditional means to prevent her of these projections may be made withoutchanging the object of this invention. Attention is also called to thefact that in certain cases where little strength on the part of the nutis required, the ordinary nut D may be omitted and this nut-lock be useddirect against the facing's of the parts to be screwed together thenut-lock in this case becoming a lock-nut.

The features of this nut lock, more par ticularly the projections 1 andthe screwthread 2 may also be applied to stamped machine parts as in thecase where two machine elements are to be secured together by means of ascrew or bolt without the use of a primary nut. The sheared andprojecting margins in the one machine element then come to bear againstthe face of the other machine element and the screw or bolt passingthrough the latter screws into the threaded opening of the former and byapplying suflicient pressure between the two elements by means of thebolt the projecting margins are forced upon the thread of the bolt andproduce a clamping or locking effect. In this case the features of myinvention would be in the form of a bolt look as it would prevent thebolt from coming loose.

Having now fully described my invention and set forth its purposes, whatI claim as new and wish to secure by Letters Patent is:

1. A nut lock comprising a plate having an opening therethrough, theplate being suitably cut to permit a portion of the material being bentto form one or more projections on one side thereof, and a screw threadbein formed in the opening and on the projections with the axis thereofsubstantially at right angles to the plate.

2. In a nut look, a plate with an opening therein and with one or moreradial cuts extending from the opening outwardly and each continued by asegmental cut concentric with the opening, the material defined therebybeing oifset from the plate to form projections from the side of theplate, and a screw thread being formed in the opening and continued ontothe projections.

3. A nut lock comprising a plate having an opening therethrough, theplate being suitably cut to permit a portion of the material being bentto form a plurality of projections from the side thereof, and a screwthread being formed in the opening and continued onto the projectionswith the axis thereof substantially at right angles to an imaginaryplane formed by the apexes of the said projections.

4:. A nut lock comprising a plate having an opening therethrough, alocking portion being formed thereon by suitably cutting the plate topermit a portion of the material being bent to protrude from the sidethereof, and a screw thread being formed in the opening and continuedonto the locking portion with the axis thereof substantially at rightangles to the general plane of the plate.

5. A nut lock comprising a plate, the plate being suitably perforated toprovide an opening therethrough and permit a portion of the materialbeing offset from the plate to form one or more projections from theside thereof, and a screw thread being formed in said opening andcontinued onto the projections with the axis thereof substantially atright angles to the general plane of said nut lock.

6. A nut lock comprising a blank having a threaded bolt receivingopening formed therein and one or more pawl-like projections formedthereon by shearing the blank radially from the bolt hole outwardly andthe outer end of each of said radial shearings being joined by a secondshearing at an angle of approximately ninety degrees to the radialshearing.

7. A nut lock'comprising a plate with a circular opening therein, one ormore cuts extending approximately radially from said opening outwardlyand each joining with an arcuate cut, the material between said radialand said circular cuts being bent from the surface of said plate to formprojections on the side thereof, a screw thread formed in said openingand being continuous and un- HERMAN J. ZOTTEL.

Witnesses:

RUDOLPH PFEIL, Jr., WILLIAM C. SCHULTZ.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

